Initiating a DASD dump

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You can initiate a dump from a DASD device.

Procedure

To obtain a dump with the CCW DASD dump tool, perform the following main steps:
  1. Stop all CPUs.
  2. Store status on the IPL CPU.
  3. IPL the dump tool on the IPL CPU.
    Note: Do not clear the main memory.

    The dump process can take several minutes depending on the device type you are using and the amount of system memory. After the dump has completed, the IPL CPU should go into disabled wait.

    The following PSW indicates that the dump process has completed successfully: 
    (64-bit) PSW: 00020000 80000000 00000000 00000000
    Any other disabled wait PSW indicates an error.
    After the dump tool is IPLed, messages that indicate the progress of the dump are written to the console: 
    00: Dumping 64 bit OS                                            
00: DFLTCC facility available, using zlib compression            
00: 00002990 / 00016384 MB (Dump file size 00000786 MB)          
00: 00004286 / 00016384 MB (Dump file size 00001824 MB)          
00: 00005613 / 00016384 MB (Dump file size 00002889 MB)          
00: 00006932 / 00016384 MB (Dump file size 00003950 MB)          
00: 00008216 / 00016384 MB (Dump file size 00004983 MB)          
00: 00009240 / 00016384 MB (Dump file size 00005808 MB)          
00: 00010561 / 00016384 MB (Dump file size 00006852 MB)          
00: 00011894 / 00016384 MB (Dump file size 00007920 MB)          
00: 00013131 / 00016384 MB (Dump file size 00008917 MB)          
00: 00016384 / 00016384 MB (Dump file size 00009235 MB)          
00: Dump successful
    The example shows that the dump was automatically compressed. If you use the zipl command with the --no-compress option, the output reflects this: 
    00: Dumping 64 bit OS                                               
00: Dump compression suppressed by --no-compress attribute       
00: 00002260 / 00016384 MB (Dump file size 00001207 MB)             
00: 00003547 / 00016384 MB (Dump file size 00002473 MB)             
00: 00004816 / 00016384 MB (Dump file size 00003738 MB)             
00: 00006083 / 00016384 MB (Dump file size 00005005 MB)             
00: 00007344 / 00016384 MB (Dump file size 00006266 MB)             
00: 00008586 / 00016384 MB (Dump file size 00007508 MB)             
00: 00009849 / 00016384 MB (Dump file size 00008771 MB)             
00: 00011119 / 00016384 MB (Dump file size 00010041 MB)             
00: 00012391 / 00016384 MB (Dump file size 00011313 MB)             
00: 00015054 / 00016384 MB (Dump file size 00012431 MB)             
00: 00016384 / 00016384 MB (Dump file size 00012789 MB) 
00: Dump successful

Results

You can IPL Linux® again.